Window ventilator



` June 17, 1.924, l 1,498,052

P. J. MACK WINDOW VENTILATOR Filed March 17 1921 lll Patented June 17, 1924.

` UNITED STATES PETER J. MACK, `OF ROCHESTER, NEVI YORK.

i WINDOW VENTILATOR..

Application led March 17, 1921. fierialy No. 452,960.

To all whom t may concern.'

Be it lrnown that I, PETER J. MACK, citizen of the United States,` residing at Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Window Ventilators, of which the following is a specification.

This invention relates to a window ventilator and has as one of its principalobjects to provide a device of this character which may be readily secured in a window casing beneath the lower sash of the window.

The invention has as a further object to i provide a ventilator so constructed that the lower sash of the window may, without removing the device from the window casing, be closed down.

And the invention has as a still further object to provide a device which may be readily adjusted to meet the requirements of windows of different widths.

@ther and incidental objects will appear hereinafter.

In the drawings:

Figure 1 is a fragmentary perspective view showing the outer side of a window of conventional design and illustrating my improved device in connection therewith,

Figure 2 is a perspective view showing the device in detail, the parts being disassembled, and

Figure 3 is a transverse sectional view on the line 3-3 of Figure 2, looking in the direction of the arrows.

In carrying the invention into effect, I employ a preferably trough shaped body 10 which may be formed of suitable resilient sheet metal and, as particularly shown in Figure 2, the longitudinal margins of the body are bent laterally in opposite directions to provide side flanges 11. Arranged in the ends of the body are screens 12 appropriately secured to the body and, as will be observed, cross strips 13 are disposed to extend between the sides of the body at its ends for bracing said sides with respect to each other and sustaining the screens at their adjacent vertical margins, the screens being also secured to said cross strips. As

shown in detail in Figure 3, the cross strips lie flush with the outer faces of the flanges.

Normally coacting with the body 10 are companion end plates 14. These end plates are also preferably formed of suitable resilient sheet metal and at their upper and lower edges are bent to provide reentrant flanges 15 slidably embracing the ianges 11 of the body. The end plates may thus be adjusted upon the body for varying the length of the device to meet the requirements of windows of different widths. At their outer end portions, the plates are bent laterally to define flanges 16.

In order that the mounting and operation of my improved ventilator may be accurately understood, I have, in Figure 1 of the drawings, shown the device in connection with a window of conventional design, this view showing the outer side of the window. 'Ihe window sill is indicated at 17 the sides of the window casing at 18, and the lower sash of the window at 19. In practice, the body 10 is rested upon the window sill 17y and the end plates are adjusted outwardly until the flanges 16 thereof abut the sides 18 of the window casing. Screws or other suitable fastening devices are then engaged through these flanges for securing the device in position, it being observed that the body is arranged to project inwardly at the inner side of the window sash. Further, it is to be noted in this connection that the device is mounted immediately at the inner side of the plane of the sash so that the outer sides of the end plates 14 lie substantially Hush with the inner'side of the bottom rail of the sash.' By this arrangementthe sash may, without removing the device from the window casing, be closed down. On the other hand, by raising theysash as suggested, the ventilator will be exposed at its outer side while closely confronting the lower rail of the sash to form a substantially closed joint therebetween. When the sash vis raised, air may, of course, flow into the body 10 and through the screens 12 at the Y ends of the same into the room, the space between the yinner ends lof the end plates 14: providing an inlet opening for the ventilator. Accordingly, by adjusting the elevation of the sash, the size of said opening may be varied to regulate the volume of air admitted through the ventilator. I accordingly provide an effective device for the purpose set forth and a device which may be readily employed in connection with any ordinary window.

Havingthus described the invention, what is claimed as new is:

A window ventilator comprising a central body consisting of a vertically bowed plate lower edges slidably engaging the flanges on the central body, said end plates being le provided with laterally extending flanges at their outer ends adapted to be secured to a window frame.

In testimony whereof I afx my signature.

PETER J. MACK. [Le] 

